The Kano model is a theory for product development and customer satisfaction developed in the 1980s by Noriaki Kano, which classifies customer preferences into five categories.
These categories have been translated into English using various names (delighters/exciters, satisfiers, dissatisfiers, etc.), but all refer to the original articles written by Kano.
| Author(s) | Driver type 1 | Driver type 2 | Driver type 3 | Driver type 4 |
|---|---|---|---|---|
| Herzberg et al. (1959) [3] | Hygiene | Motivator | ||
| Kano (1984) [4] | Must-be | Attractive | One-dimensional | Indifferent |
| Cadotte and Turgeon (1988) [5] | Dissatisfier | Satisfier | Critical | Neutral |
| Brandt (1988) [6] | Minimum requirement | Value enhancing | Hybrid | Unimportant as determinant |
| Venkitaraman and Jaworski (1993) [7] | Flat | Value-added | Key | Low |
| Brandt and Scharioth (1998) [8] | Basic | Attractive | One-dimensional | Low impact |
| Llosa (1997, [9] 1999 [10] ) | Basic | Plus | Key | Secondary |
| Chitturi et al., (2008) [11] | Hedonic | Utilitarian |
One of the main points of assessment in the Kano model is the threshold attributes. These are basically the features that the product must have in order to meet customer demands. [12] If this attribute is overlooked, the product is simply incomplete. If a new product is not examined using the threshold aspects, it may not be possible to enter the market. This is the first and most important characteristic of the Kano model. [13] The product is being manufactured for some type of consumer base, and therefore this must be a crucial part of product innovation. Threshold attributes are simple components to a product. However, if they are not available, the product will soon leave the market due to dissatisfaction. The attribute is either there or not. An example of a threshold attribute would be a steering wheel in a car. The car is no good if it is not able to be steered. [14]
The threshold attributes are most often seen as a price of entry. Many products have threshold attributes that are overlooked. Since this component of the product is a necessary guideline, many consumers do not judge how advanced a particular feature is. Therefore, many times companies will want to improve the other attributes because consumers remain neutral to changes in the threshold section. [15]
A performance attribute is defined as a skill, knowledge, ability, or behavioural characteristic that is associated with job performance. Performance attributes are metrics on which a company bases its business aspirations. They have an explicit purpose. Companies prioritise their investments, decisions, and efforts and explain their strategies using performance attributes. These strategies can sometimes be recognised through the company's slogans. For example Lexus's slogan is "The Pursuit of Perfection" (Quality) and Walmart; "Always low prices. Always" (Cost). In retail the focus is generally on assuring availability of products at best cost.
Performance attributes are those for which more is better, and a better performance attribute will improve customer satisfaction. Conversely, a weak performance attribute reduces customer satisfaction. When customers discuss their needs, these needs will fall into the performance attributes category. Then these attributes will form the weighted needs against the product concepts that are being evaluated. The price a customer is willing to pay for a product is closely tied to performance attributes. So the higher the performance attribute, the higher the customers will be willing to pay for the product.
Performance attributes also often require a trade-off analysis against cost. As customers start to rate attributes as more and more important, the company has to ask itself, "how much extra they would be willing to pay for this attribute?" And "will the increase in the price for the product for this attribute deter customers from purchasing it." Prioritization matrices can be useful in determining which attributes would provide the greatest returns on customer satisfaction. [16]
Not only does the Kano model feature performance attributes, but additionally incorporates an "excitement" attribute, as well. Excitement attributes are for the most part unforeseen by the client but may yield paramount satisfaction. Having excitement attributes can only help you, but in some scenarios it is okay to not have them included. The beauty behind an excitement attribute is to spur a potential consumer's imagination, these attributes are used to help the customer discover needs that they've never thought about before. [17] The key behind the Kano model is for the engineer to discover this "unknown need" and enlighten the consumer, to sort of engage that "awe effect." Having concurrent excitement attributes within a product can provide a significant competitive advantage over a rival. In a diverse product assortment, the excitement attributes act as the WOW factors and trigger impulsive wants and needs in the mind of the customer. The more the customer thinks about these amazing new ideas, the more they want it. [18] Out of all the attributes introduced in the Kano model, the excitement ones are the most powerful and have the potential to lead to the highest gross profit margins. Innovation is undisputedly the catalyst in delivering these attributes to customers; you need to be able to distinguish what is an excitement today, because tomorrow it becomes a known feature and the day after it is used throughout the whole world. [19]
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As customer expectations change with the level of performance from competing products, attributes can move from delighter to performance need and then to basic need.
For example, In 2009, mobile phone charge would last 12 hours. As each new mobile phone generation improved battery life, the attribute of 12-hour battery life has shifted from delighter to less than a basic need.
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Kano proposes a standardized questionnaire to measure participants' opinions in an implicit way. The participants therefore need to answer two questions for each product feature, from which one is "functional" (formulated in a positive way) and one is "dysfunctional" (formulated in a negative way).
| I like it | I expect it | I am neutral | I can tolerate it | I dislike it | |
| Functional | |||||
| How would you feel if the product had ...? | |||||
| How would you feel if there was more of ...? | |||||
| Dysfunctional | |||||
| How would you feel if the product did not have ...? | |||||
| How would you feel if there was less of ...? | |||||
Based on the combination of answers by one participant for the functional and dysfunctional questions, one can infer the feature category.
| Functional | Dysfunctional | Category | ||
| I expect it | + | I dislike it | → | Must-be |
| I like it | + | I dislike it | → | One-dimensional |
| I like it | + | I am neutral | → | Attractive |
| I am neutral | + | I am neutral | → | Indifferent |
| I dislike it | + | I expect it | → | Reverse |
Illogical answers (e.g., "I like it" for both the functional and dysfunctional questions) are usually neglected or put in a special category "Questionable". Various approaches for the aggregation of categories across multiple participants have been proposed, from which the most common ones are the "Discrete analysis" and "Continuous analysis", [20] also "Satisfaction coefficients". [21]
The data for the Kano model typically is collected via a standardized questionnaire. The questionnaire can be on paper, collected in an interview, or conducted in an online survey. For the latter, general online survey software can be used, while there also are dedicated online tools specialized in the Kano model and its analysis. [22] [23] [24] [25]
Quality function deployment (QFD) makes use of the Kano model in terms of the structuring of the comprehensive QFD matrices. [26] Mixing Kano types in QFD matrices can lead to distortions in the customer weighting of product characteristics. For instance, mixing Must-Be product characteristics—such as cost, reliability, workmanship, safety, and technologies used in the product—in the initial House of Quality will usually result in completely filled rows and columns with high correlation values. Other Comprehensive QFD techniques using additional matrices are used to avoid such issues. Kano's model provides the insights into the dynamics of customer preferences to understand these methodology dynamics.
The Kano model offers some insight into the product attributes which are perceived to be important to customers. The purpose of the tool is to support product specification and discussion through better development of team understanding. Kano's model focuses on differentiating product features, as opposed to focusing initially on customer needs. Kano also produced a methodology for mapping consumer responses to questionnaires onto his model.
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